Extrusion gun heater



Feb. 13, 1962 K. c. LEASE, sR

EXTRUSION GUN HEATER Filed April 1, 1959 Kenneth C. Lease, 5/:

INVENTOR. 405:.

BY Q1...

anyway FM United States Patent 3,020,907 EXTRUSION GUN HEATER Kenneth C.Lease, Sr., E. Rock Road, Allentown, Pa. Filed Apr. 1, 1959, Ser. No.803,478 4 Claims. (Cl. 126229) This invention relates to new and usefulimprovements in heaters for extrusion guns particularly although notnecessarily, for caulking, glazing, etc., and has for its primary objectto provide, in a manner as hereinafter set forth, novel means forheating the caulking or other material to be extruded, thus facilitatingthe use of such guns in cold weather.

Another important object of the present invention is to provide aheating means of the aforementioned character which may be applied toextrusion guns which are already in use or at the time of manufacture.

Other objects of the invention are to provide a heating means forextrusion guns which will be comparatively simple in construction,strong, durable, compact, of light weight and which may be manufacturedat low cost.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

FIGURE 1 is a perspective view of an extrusion gun provided with heatingmeans embodying the present invention;

FIGURE 2 is a top plan view thereof with the cover open and broken away,showing the cartridge in horizontal section; and

FIGURE 3 is a view in transverse section, taken substantially on theline 33 of FIGURE 2, showing the cover closed and the cartridge omitted.

Referring now to the drawing in detail, it will be seen that referencecharacter 4 designates generally a conventional caulking gun of theportable, hand-operated type. The gun 4 includes the usual semi-circularbarrel or trough 5 for the reception of a cartridge 6, said cartridgeincluding a discharge nozzle 7 on one end.

The embodiment of the present invention which has been illustratedcomprises a metallic casing or jacket 8 of cylindrical form which isadapted to substantially enclose the barrel or trough 5 of the gun 4 andthe cartridge 6 in said barrel or trough. The jacket 8 includes agenerally semi-circular lower section 9 which is secured longitudinallyin any suitable manner beneath the barrel or trough 5. The jacket 8further includes a semi-circular upper section or cover 10 which ispivotally secured on one side to the corresponding side of the lowersection 9 by a piano hinge 11. The free longitudinal marginal portion ofthe upper section or cover 10 is engageable in a groove or channel 12provided therefor in the upper portion of the lower section 9. Thus, theupper section or cover 10 is frictionally secured in closed position. Ifdesired, the upper section or cover 10 may be positively secured inclosed position through the medium of a suitable latch.

The lower section 9 of the jacket 8 comprises spaced, concentric innerand outer walls 13 and 14, respectively, providing a chamber for thereception of a suitable liquid fuel and an absorbent material, asindicated at 15.

Mounted on top of the lower section 9 of the jacket 3,020,907 PatentedFeb. 13, 1962 ice 8, on both side portions thereof, is a pair of burners.16. The burners 16 include wicks 17 which extend downwardly into thechamber 15 through openings provided therefor in the top of the lowersection 9 of the jacket 8. Resilient angular metallic clips 18 removablysecure the burners 16 in position. The upper section or cover 10 of thejacket 8 is provided with a plurality of ventilating openings 19 for theburners 16.

It is thought that the use or operation of the invention will be readilyapparent from a consideration of the foregoing. Briefly, the uppersection or cover 10 of the jacket 8 is swung to open position and thecartridge 6 is inserted in the barrel or trough 5 of the extrusion gun4. The burners 16 are ignited and the upper section or cover 10 isclosed. The forward end walls 20 and 21 of the jacket sections 9 and 10,respectively, have formed therein opposed recesses defining an openingwhich accommodates the nozzle 7 of the cartridge 6. This opening isindicated at 22. As shown to advantage in FIGURE 3 of the drawing, theupper section or cover 10 of the jacket 8 is spaced concentrically fromthe cartridge 6. Thus, heat generated by the ignited burners 16 maycirculate freely in the upper portion of the jacket 8 for warming thecartridge 6 in an obvious manner.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed and accordingly all suitable modifications and equivalents maybe resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A heater for extrusion guns of the type including a barrel, saidheater comprising a generally cylindrical jacket for receiving andenclosing an extrusion gun barrel, said jacket including a fuel chamberand further including a cover hingedly mounted on said fuel chamber, andburners in the jacket mounted on the fuel chamber and operativelyconnected thereto for heating the interior of said jacket.

2. A heater for extrusion guns of the type including a barrel, saidheater comprising a generally cylindrical jacket for receiving andenclosing an extrusion gun barrel to be heated, said jacket including agenerally semi-circular fuel chamber and further including a generallysemi-circular, perforated, complemental cover hingedly mounted on saidfuel chamber, and a plurality of burners in the jacket mounted on thefuel chamber and operatively connected to said fuel chamber for heatingthe interior of said jacket.

3. A heater for extrusion guns of the type including a barrel, saidheater comprising a generally cylindrical jacket for receiving andenclosing an extrusion gun barrel to be heated, said jacket including agenerally semicircular fuel chamber comprising spaced, concentric,generally semi-circular inner and outer walls, said jacket furtherincluding a generally semi-circular cover hingedly mounted on said fuelchamber, and burners in the jacket mounted on and operatively connectedto the fuel chamber for heating the interior of the jacket.

4. An extrusion gun heater comprising a generally cylindrical jacket forreceiving and substantially enclosing an extrusion gun to be heated,said jacket including spaced, concentric, generally semi-circular innerand outer wall portions defining a generally semi-circular fuel chamber,said inner Wall portion adapted to seatingly receive therein anextrusion gun barrel, said jacket further including a generallysemi-circular, perforated cover hingedly mounted on the fuel chamber andcooperable therewith for enclosing the gun barrel, and burners in thejacket mounted on and operatively connected to the fuel chamber forheating the interior of said jacket, said burners comprising Wickssecured on the fuel chamber and including at least one end portionextending thereinto.

References Cited in the file of this patent UNITED STATES PATENTSHellenbroich Oct. 2, 1934 Hoffman Nov. 10, 1936 Myers et a1. Sept. 18,1951 Thorpe Apr. 29, 1958 FOREIGN PATENTS Great Britain Sept. 4, 1957

